[Atomics] Make Atomics.exchange a builtin using TF

src/compiler/code-assembler.h

Index: src/compiler/code-assembler.h
diff --git a/src/compiler/code-assembler.h b/src/compiler/code-assembler.h
index 1e3426bc166d2efe80981ae3fcec2c74a01b824f..f56e4ce0f25dcadb68eb3ddd3c69018aa6b0e753 100644
--- a/src/compiler/code-assembler.h
+++ b/src/compiler/code-assembler.h
@@ -270,6 +270,9 @@ class V8_EXPORT_PRIVATE CodeAssembler {
   Node* AtomicStore(MachineRepresentation rep, Node* base, Node* offset,
                     Node* value);
 
+  // Exchange value at raw memory location
+  Node* AtomicExchange(MachineType type, Node* base, Node* offset, Node* value);
+
   // Store a value to the root array.
   Node* StoreRoot(Heap::RootListIndex root_index, Node* value);